Tennis ball holder



FIG. 1 is a top view illustrating the design of this invention for a tennis ball holder, the bottom view being essentially identical thereto;

FIG. 2 is a front view of the design of FIG. 1.

FIG. 3 is a view of one end of the design of FIG. 1, the other end being identical; and

FIG. 4 is a view taken from the rear of the design of FIG. 1. 

The ornamental design for a tennis ball holder, substantially as shown and described. 